Let me share the harsh truth: most HVAC failures happen because someone missed a step. Didn't calculate the load properly. Used undersized equipment. Miscalculated the insulation needs. We've fixed countless of these disasters. And each time, we remember another learning. Like in 2017, when we decided on adding WiFi controls to each system. Why? Because Sarah, our senior tech, got tired of watching homeowners burn money on bad temperature settings. Now clients save 20-30% yearly. https://stackoverflow.com/users/32195419/product-air-heating-cooling?tab=profile